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Evolutionary benefits of animals complete digestive tube

Give some evolutionary benefits of animals with the complete digestive tube?

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The complete digestive tube permits animals to constantly feed themselves with no waiting for residuals to be removed before starting the digestion of new foods. In this manner, the absorption of bigger amount of nutrients is possible and thus bigger and more complex species can build up.

Digestive tubes with two openings as well make digestion more proficient as they provide distinct sites with various physical and chemical conditions (that is, stomach, mouth and bowels) for the action of distinct complementary digestive enzymatic systems.

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